Nematicidal Activity of N-Substituted and N, N-Disubstituted Alkylamines against the Pine Wood Nematode, Bursaphelenchus xylophilus

Abstract

In the random screening of nematicidal compounds against the pine wood nematode, Bursaphelenchus xylophilus, using the immersion test, a series of N-alkyl- and N, N-dialkyl oleylamines, dialkylamines, and their related compounds were tested. Among these tested, didecylamine was identified as the most potentially-active nematicidal compound (LC₅₀ ; 4.19μM, 1.24ppm). Amongst a total of 23 alkylamines, six N- and N, N-dialkyl oleylamines, including oleylamine, and three dialkylamines showed a higher activity than octadecylamine (LC₅₀ ; 8.61μM, 2.08ppm) on a concentration basis. A total of 9 compounds tested indicated higher activity than octadecylamine on a molar basis.